A Numerical Study on the Effects of Building Balcony and Atmospheric Stability on Pollutant Dispersion in An Urban Street Canyon
Abstract
Pedestrians in street canyons are easy to be exposed to air pollutants. Many previous studies have shown that flows and pollutant dispersion in street canyons were related to meteorological (ambient wind speeds, differential surface heating) and geometric factors (aspect ratios, orientations). Atmospheric stability is also an important factor in a view of pollutant dispersion in street canyons. Some recent studies showed that building balconies could change the surrounding local circulations and pollutants distributions. This study aimed to examine the effects of building balconies and atmospheric stability on flows and pollutant dispersion in a street canyon using a computational fluid dynamics (CFD) model. We first validated the CFD model against a wind tunnel measurement conducted around buildings with balconies. Then, we conducted simulations in a street canyon for the stable, neutral, and unstable atmospheric conditions in the absence and presence of balconies.
This research was supported by the MSIT(Ministry of Science, ICT), Korea, under the High-Potential Individuals Global Training Program) (RS-2022-00155315) supervised by the IITP(Institute for Information & Communications Technology Planning & Evaluation- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2022
- Bibcode:
- 2022AGUFM.A25G1788K